Artificial denture.



W. J. CURRY.

ARTIFICIAL DENTUHE.

APPLIOA'FION FILED MAR.21.1914.

1,128,664. Patented Feb. 16, 1915.

2 Dig-1 nic i. K 61' j IN VEN TOR William J Curry.

WITNESSES: Mud/ mm UNHED STATES PATENT ()FFICE.

WILLIAM JAMISON CURRY, OF VANCOUVER, BRITISH COlZUMBIA, CANADA.

anrirrcmr. DENTURE.

Specification of Letters Patent. Patented F b. 16 1915 Application iud March 21, 1914. Serial No. 826,377.

This invention relates to an improved means. for attaching an artificial tooth to a J metalbacking on which it is mounted, and -is applicable to either plate, bridge, 'or individual crown work, the object being to simplify the manner of attachment and to enable the tooth tobe removable for change or repair.

The invention is particularly described in the following specification, reference being made to the drawings by which it is accompanied, in which:

Figure. -1 is a perspective view' to an enlarged scale ofla single tooth attachment. Fig. 2 is a similar view of an artificial molar tooth as prepared for attachment. Fig. 3 is a'sectional plan of a-tooth with the crown removed. Figs. 4 and 5 show a perspective and sectional plan of three teeth mountings as attached together to form abridge, and

Fig. 6 isa sideelevation showing the attachment as applied to an individual crown.

= The device comprises the combination with av tooth body 5 having agroove fi on each side. of a back plate 2' having sides 3 .f ir\-vardly hcn't from. it, the edges of which sidesare imvardly bent, as at 4, to fit the grooves (5 of the tooth body. Preferably the lingual face of the tooth body is taperedfrom the larger dimension at the crown to the smaller dimens on atthe neck in which case the grooves 6 should be substantially" parallel to the front'face of the tooth and is cemented.

the sides 3 of the metal backing are correspondingly triangular so that when the tooth body is inserted between the sides 3 with the inwardlFturned edgesin the grooves (i as the tooth.is pressed down it will wedge itself tightly, against the back plate 2. Within this backing the tooth'body Fig. 6 shows the applicationof this attaching d'eviceto an individual crownrl I fore the tooth body 5 is'placed in POSltl='.z.

the retaining plate 2, 3, 4 is strongly soldered, as M7, to the cap plate 8 ofthe root, and the tooth body 5 is thereafter-cemented and pr ssed tightly nto position.

Where the device is applied to bridge work, the sides 3 of the attaching plates are soldered together at 9, as shown in Figs. '4'

and o.

for the effective soldering of which the-sides 3 offer an ample area, and they are c thereafter strongly soldered to the abutment attachment.

In the case of plate work, the lower edges of the back plates 2 are strongly soldered to the edge of the plate and the sides 3. to one another. i

As shown in Figs. 3 and 5, the width of the tooth body, where it passes between the Side plates 3, may be reduced by thethick-' ness of the late 3 on each side and the soldering, so t at the sides .of the teeth 5 may be brought close together and avoizg exposure of the gold or other metal of the attachrnent. 1

It will be seen that the attachment as here set forth is not only particularly simple and convenient-one to manufacture and use, but it affords facility forthe removal of any tooth for change or repair. Further, the required soldering may be done before the teeth are inserted so that there is no risk of soldering.

The teeth are not only supported and strengthened by the metal of the back but the depth of the back plates with the teeth/ m position also. forms a particularly strong structure for both bridge or plate'work. I

Having now particularly described my invcntion, I hereby declare that what I claim as new and desire to be protected in byLetters Patent, is:

prising in combination,'a tooth body the of the teeth being fractured during the work back-of which is flat and extends from the.

1. An artificial tooth attachment, com- I back edge adjacent the attrition surfaceforward toward the front at the cervical end, each sideof the-tooth havinga groove adjacent and substantially parallel to the front face of the tooth body, the'sides of the tooth to the rear of said grooves being parallel plane surfaces, and a plate of thin shazt metal fitting against the flat'back and the Lsidesof the tooth, .the frontledgespf the =sides -of the metal plate being bent inward to fit the'grooves. and means for attaching this fastening to the-structure by which the 'tach'me'nts are brought into juxtaposition s de by sidethe abutting sides of adjacent tooth is supported in the jaw, all bein .arranged whereby when two or more toot atattachments will contact one another throughout their entire side surfaces for the purposes described.

2. An artificial tooth attachment,-comprising in combination, a tooth body the back of which is a flat surface which extends from the back edge of the attrition surface forward toward the cervical end-of the tooth, each side of the tooth having a groove adjacent and substantially parallel to the front face of the tooth body, and from this groove to the back the sides of the tooth body are flat, and a plate ofthin I sheet inetal fitting against the flat back and the flat sides of the tooth the front edges of 15 the sides of which plate are turned inward to fit the coves, and means for attaching this fastening to the structure by which the tooth is supportedin the jaw.

In testimony whereof I aflix my signature 20 in presence oftwo witnesses. v

WILLIAM JAMISON CURRY.

Witnesses ROWLAND BRITTAIN, MAY Warm. 

